Synergistic multiple hydrogen bonds and reversible crystallization effect enable ultra-tough, self-healing, and recyclable cellulose-enhanced elastomer

被引：0

作者：

Yu, Mingming ^{[1
]}

Saad, Mujaheed Halliru ^{[1
]}

Lin, Xiangyu ^{[2
]}

Dong, Fuhao ^{[2
]}

Fan, Xu ^{[3
]}

Xu, Xu ^{[1
]}

Liu, He ^{[2
]}

Song, Zhanqian ^{[2
]}

机构：

[1] Nanjing Forestry Univ, Coll Chem Engn, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Int Innovat Ctr Forest Chem & Mat,Jiangsu Prov Key, Nanjing 210037, Jiangsu, Peoples R China

[2] Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Key Lab Biomass Energy & Mat, Natl Engn Lab Biomass Chem Utilizat,Key & Open Lab, Nanjing 210042, Jiangsu, Peoples R China

[3] Daqing Normal Univ, Coll Chem Engn, Daqing 163712, Heilongjiang, Peoples R China

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2025年 / 261卷

基金：

中国国家自然科学基金;

关键词：

Cellulose; Elastomer; Hydrogen bond; Self-healing; Tough;

D O I：

10.1016/j.compscitech.2024.111014

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Incorporating dynamic covalent bonds into polyurethane (PU) elastomers contributes to exceptional self-healing and recyclable properties. However, further applications are seriously limited due to unsatisfying mechanical characteristics. Herein, a self-healing and ultra-robust nanocomposite elastomer is presented here that consists of polyurethane matrix and cellulose nanocrystals through the synergistic gradient hydrogen bonds and straininduced reversible crystallization effect. Multiple dynamic hydrogen bonds formed between cellulose nanocrystals (CNC) and polyurethane (PHHD) together with the strain-induced reversible crystallized physical network facilitate excellent mechanical properties while maintaining favorable self-healing ability. The introduction of cellulose nanocrystals significantly enhanced the binding energy of the nanocomposite polyurethane elastomer system, exhibiting an increase of 204.32 kJ/mol. Consequently, nanocomposite elastomers display a remarkable tensile strength (up to 50.1 MPa), ultra-high toughness (441.6 MJ/m3), and excellent fracture energy (214.5 kJ/m2) Furthermore, the result found that the introduction of cellulose nanocrystals can reduce the reaction activation energy and obtain nanocomposite elastomers with highly efficient self-healing (93.9 %). The innovative approach is expected to facilitate the development of high-strength, tough, and exceptional selfhealing elastomers in academia and industry.

引用

页数：9